Jody Garnett wrote:
So it is time to work with others, the geotools project has ported the
uDig IResolve API (for catalog), and completed it as an implementation
of the "extensible interface pattern". What does this mean? It means
that you will be able to supply a factory that can make new adapters
for existing IService and IResource handles (no more if/then/else logic).
I have several choices ...
Option 1: extend at the interface level
Option 2: extend at the implementation level
Both of these fail due to the conflict between URL and URI.
Option 3: Bridge
Going to try Option 3, sorry I messed up the example earlier....
class GTGeoResource extends IGeoResource {
GTGeoResource( GeoResource geotoolsHandle );
}
I will also grab the interface I need from GeoTools and port it to
eclipse progress monitors:
public interface IResolveAdapterFactory {
boolean canAdapt(IResolve resolve, Class adapter);
Object adapt(IResolve resolve, Class adapter, IProgressMonitor monitor)
throws IOException;
}
The alternative is to make use of the Eclipse Platform facilities for
this stuff ...
interface IAdapterFactory {
public Object getAdapter(Object adaptableObject, Class adapterType);
public Class[] getAdapterList();
}
Although I am a bit concerned that using IAdapterFactory misses some of
the point:
1. the "target" class is not present in the interface (instead it is
part of the XML referring to this class)
2. there is no opportunity to provide a progress monitor when creating
the adapter
Point 1 is not so much of a problem, Point 2 breaks the spirit of
IResolve (be explicit about delay at the API level) - so I am going to
proceed with IResolveAdapterFactory as based on Justin's work.
(The only other thing would be to check the common navigator framework
now that it is ready, although I think that may be an Eclipse 3.2 only
thing - in terms of "integration" with eclipse we are probably going to
have to support this framework eventually anyways).
Cheers,
Jody
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User-friendly Desktop Internet GIS (uDig)
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